WO1998053020A1 - Film d'enduction resistant a l'eau et son utilisation - Google Patents

Film d'enduction resistant a l'eau et son utilisation Download PDF

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Publication number
WO1998053020A1
WO1998053020A1 PCT/CH1998/000177 CH9800177W WO9853020A1 WO 1998053020 A1 WO1998053020 A1 WO 1998053020A1 CH 9800177 W CH9800177 W CH 9800177W WO 9853020 A1 WO9853020 A1 WO 9853020A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating film
adhesive
protein
waterproof coating
film according
Prior art date
Application number
PCT/CH1998/000177
Other languages
German (de)
English (en)
Inventor
Benjamin LÜTHI
Original Assignee
Casanin Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Casanin Ag filed Critical Casanin Ag
Priority to AU70261/98A priority Critical patent/AU7026198A/en
Publication of WO1998053020A1 publication Critical patent/WO1998053020A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D23/00—Details of bottles or jars not otherwise provided for
    • B65D23/12—Means for the attachment of smaller articles
    • B65D23/14—Means for the attachment of smaller articles of tags, labels, cards, coupons, decorations or the like
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J189/00—Adhesives based on proteins; Adhesives based on derivatives thereof

Definitions

  • the present invention relates to a waterproof coating film which can be converted into a fast-absorbing adhesive, and to its use for the labeling technology and the envelope industry.
  • Adhesives are used, the basis of which can be starch, dextrins, caseins and synthetic resin dispersions, individually or as a mixture. These are in an aqueous phase. Different container surfaces, such as glass, plastic and metal, as well as the running speed of the labeling system are decisive for the selection of the suitable adhesive.
  • Condensation-resistant adhesive layers are e.g. B. achieved by adhesives that are based on CA or mixtures thereof. However, dextrin and starch adhesives have poor condensation values.
  • Labeling wet adhesives are usually heated to 25 to 35 ° C in order to achieve high attraction and low glue consumption.
  • labeled containers are reused, they must be washed and the label removed. This is done with a hot alkaline lye, which dissolves and breaks down the adhesive. Casein glue and their mixtures are waterproof. However, they are broken down by alkaline washing media and consume corresponding amounts of alkali. It is common in the envelope industry to coat the mouth flaps with rewettable adhesives. The adhesive film is activated with water or saliva. The adhesive bond achieved remains water-soluble. The envelopes can be easily opened and closed again using steam. There is no protection against opening. With mechanical closing, the cadences are limited. We are therefore looking for faster systems.
  • DE 44 00 609 A describes a wood-containing thin printing paper in the basis weight range below 49 g / m 2 , which is provided with a surface pigmentation.
  • This surface pigmentation only contains a certain amount of natural binder, e.g. B. Casei ⁇ , protein, cellulose derivatives such as carboxymethyl cellulose, polyvinyl alcohol and starch. This creates a thin printing paper that is free of synthetic binders and has better print quality, sufficient rigidity and strength.
  • a protein-containing composition which is used as a paper coating.
  • These contain modified vegetable proteins as binders.
  • a preferred vegetable protein is soybean protein.
  • the vegetable protein is first hydrolyzed. The protein thus hydrolyzed is then oxidized. Particularly strong oxidizing agents are used as oxidizing agents, with hydrogen peroxide being preferred.
  • binders have improved stability, dispersibility and whiteness.
  • EP 0 601 737 A discloses a binder made from a modified protein, which is produced by oxidizing a vegetable protein material with an oxidizing agent in the presence of a magnesium salt.
  • the binder is used for paper coatings, which have improved whiteness, brightness and strength.
  • EP 0 549 803 A relates to a packaging material which contains a polymer and / or a water-soluble resin and vegetable fibers as reinforcing components. The water solubility of the polymer can be adjusted by changing the temperature of the water used for this.
  • This packaging material is strong enough to be used for a variety of packaging types under normal circumstances.
  • the packaging material is e.g. B. Made by laminating two or more paper webs using an aqueous solution of the polymer as an adhesive layer.
  • the packaging material obtained in this way is biodegradable without destroying nature, it burns without the development of gases which are harmful to humans, it is stable to neutral to weakly acidic solutions, such as rainwater, it has great strength and it has good barrier properties, Transparency, moisture permeability and printability.
  • the object of the invention is therefore to create an adhesive bonding system which avoids the above disadvantages, i. H. makes the use of conventional wet glue superfluous for the user in the labeling industry and replaces the conventional water-soluble mouth flap rubber glue in the envelope industry.
  • this object is achieved by a waterproof coating film for the production of an adhesive for sticking labels onto surfaces or for gluing envelopes.
  • Preferred embodiments are the subject of the dependent claims.
  • the main component of the coating film according to the invention is a protein and / or protein derivative which can be activated by alkaline means.
  • proteins are understood to mean proteins of any kind (animal or vegetable origin).
  • protein derivative includes compounds derived from proteins.
  • composition of the coating film according to the invention essentially consists of protein and / or protein derivative and auxiliary substances.
  • the coating film can be used to coat labels and envelopes.
  • Labels can be plastic films or paper, especially thin paper, of any kind, which can be used as labels on objects, e.g. B. containers, such as containers made of glass, plastic or metal, can be applied.
  • the coating can be wet, i. H.
  • the above proteins and / or protein derivatives and auxiliaries are introduced into an aqueous medium which is then applied to the above labels in a manner known to the person skilled in the art. This is followed by a drying process, resulting in a dry coating of the labels and envelopes with the waterproof coating film according to the invention.
  • the above waterproof coating film can be "programmed” into an adhesive. This can be done with an aqueous alkaline activator.
  • aqueous alkaline activator is understood to mean alkaline compounds of any kind which are present in an aqueous medium.
  • the conversion of the coating film into an adhesive by means of the above activator can be carried out by bringing the coating film into contact with the alkaline activator.
  • the alkaline activator e.g. B. labels are glued to containers.
  • the labels can thus re ⁇ use and recycling is facilitated also be removed easily from the container.
  • the adhesive can be "programmed” chemically degraded. To do this, the wash liquor must be made alkaline. Surfactants speed up the process.
  • the proteins and protein derivatives contained in the adhesive are biodegradable.
  • the present invention has a number of advantages.
  • the coating film according to the invention is climate-resistant, i. H. it is also affected by moisture, e.g. B. moist air, not activated to the adhesive.
  • moisture e.g. B. moist air
  • the conversion to the adhesive takes place only by using the alkaline activator.
  • Back-coated films and papers can be printed and finished as usual.
  • Envelopes whose mouth flap has been provided with the above waterproof coating film are sealed with an aqueous alkaline activator.
  • the adhesive produced using the coating film according to the invention enables high machine cadences and offers increased opening protection when the envelope is closed.
  • the active adhesive is quick to attract.
  • the adhesive can be used in labeling technology for dry or wet, hot or cold surfaces. It is also resistant to condensation and water. Conventional labeling systems can also be used, the alkaline activator being used instead of the labeling adhesive used hitherto. Since no labeling adhesive has to be used, there is no contamination from adhesive splashes. Also, no glue is wasted due to incorrect machine settings. In addition, removing the labels is particularly easy. The invention is explained below with reference to the figure.
  • FIG. 1 shows a method for sticking a label onto a bottle using a coating film according to the invention and the subsequent removal of the label.
  • a label 1 the back of which is coated with a dry coating film according to the invention, is brought into contact with an alkaline activator, e.g. B. sprayed on it.
  • the label 1 is then glued to a bottle 2, whereby a bottle 3 with the label is obtained.
  • the label 1 is detached from the bottle 3 containing the label after use, e.g. B. after return to a brewery or bottling plant, using alkali, which in turn a clean bottle 2 is removed from the label 1 is obtained. This can then be labeled in accordance with the above procedure.
  • the coating film has the following composition:
  • This composition can be used to wet-coat plastic films or paper backing or mouth flaps of envelopes with 6 - 60 g / m 2 . After drying, these materials can be printed and finished if necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

L'invention concerne la production d'un film d'enduction résistant à l'eau pour la production d'un adhésif destiné à coller des étiquettes sur des surfaces ou à fermer des enveloppes. Le film d'enduction contient une protéine ou un dérivé de protéine et est mis, de préférence, en contact avec un activateur alcalin.
PCT/CH1998/000177 1997-05-21 1998-05-01 Film d'enduction resistant a l'eau et son utilisation WO1998053020A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU70261/98A AU7026198A (en) 1997-05-21 1998-05-01 Watertight coating film and its use

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1181/97 1997-05-21
CH118197 1997-05-21

Publications (1)

Publication Number Publication Date
WO1998053020A1 true WO1998053020A1 (fr) 1998-11-26

Family

ID=4204399

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1998/000177 WO1998053020A1 (fr) 1997-05-21 1998-05-01 Film d'enduction resistant a l'eau et son utilisation

Country Status (2)

Country Link
AU (1) AU7026198A (fr)
WO (1) WO1998053020A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3037357A1 (fr) * 2014-12-23 2016-06-29 Krones AG Dispositif et procede destines a l'etiquetage d'etiquettes adhesives pouvant etre activees

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH114287A (de) * 1925-12-25 1926-03-16 Casanin A G Verfahren zur Herstellung von Bindemitteln aus Kasein.
JPS62131080A (ja) * 1985-12-04 1987-06-13 Dainippon Ink & Chem Inc 水性接着用組成物
JPH05230433A (ja) * 1992-02-19 1993-09-07 Kuraray Co Ltd ラベル用接着剤
JPH0876689A (ja) * 1994-09-07 1996-03-22 Toppan Printing Co Ltd ガラス瓶用ラベル

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH114287A (de) * 1925-12-25 1926-03-16 Casanin A G Verfahren zur Herstellung von Bindemitteln aus Kasein.
JPS62131080A (ja) * 1985-12-04 1987-06-13 Dainippon Ink & Chem Inc 水性接着用組成物
JPH05230433A (ja) * 1992-02-19 1993-09-07 Kuraray Co Ltd ラベル用接着剤
JPH0876689A (ja) * 1994-09-07 1996-03-22 Toppan Printing Co Ltd ガラス瓶用ラベル

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 8729, Derwent World Patents Index; AN 202709 *
DATABASE WPI Week 9340, Derwent World Patents Index; AN 317734 *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 361 (C - 459) 25 November 1987 (1987-11-25) *
PATENT ABSTRACTS OF JAPAN vol. 17, no. 689 (C - 1143) 16 December 1993 (1993-12-16) *
PATENT ABSTRACTS OF JAPAN vol. 96, no. 007 31 July 1996 (1996-07-31) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3037357A1 (fr) * 2014-12-23 2016-06-29 Krones AG Dispositif et procede destines a l'etiquetage d'etiquettes adhesives pouvant etre activees

Also Published As

Publication number Publication date
AU7026198A (en) 1998-12-11

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